Beneath the ancient Chinese scholar tree at the end of summer, Gu Bailiang made a childhood promise to stay together forever. A jade bracelet and a tea made with perilla, peach, and ginger concealed his deep, tender affection. But Jiang Rong mistakenly trusted the wrong people, broke off their engagement, and pursued an illusory love. After five years together, she became nothing more than a substitute, and the endless social engagements and grievances eventually left her heart completely cold. Fifteen years passed, yet Gu Bailiang continued to protect her silently, his love never diminishing. As the mysteries surrounding her identity are unraveled and emotional entanglements unfold, Jiang Rong finally realizes her mistake and turns back to find the man who has never abandoned her. After years of delayed devotion, their feelings are finally reciprocated, allowing the two to spend the rest of their lives together.